Electric heater.



A. S. CUBITT.

ELECTRIC HEATER.

APPLICATION FILED $21 121, 1910.

1,077,676. Patented Nov 4, 1913.

Witnesses: Inventor:

/7 2% J24 fi chibald S.Cubitt,

'His Dfttorneg.

srn rns PATENTOFFIOE.

' 'nwmmwsgcumm, or err'rsrrrnn, MASSACHUSETTS, AssreNon TO GENERALnnnc'rnrc COMPANY; -A conrona'rronor NEW-YORK,

w a nnnornron narnn.

. Specification of Letterslatent.

To all it may concern:

Be. itkuownthatl, ARoHmALo S. Comm,

1 a subject of the King of Great Britain, re- .f

siding at Pittsfield, county of Berkshire,

State of- Massachusetts, haveinvented cer.,

, tain' new and useful Improvements in,E lectrio 'Heaters, of whiohthefollowing is a specifi e oe.

; invention relates to electric heaters and has for its objecttheprovision of an im proved selgfi-contained -electric heating unit whichmay be used either separately. or com-- and inexpensive heater;

- "provide a self-contained heating unit WhlCll bined withfother's-toform a simple, efficient One of the oblects ofmy invention is will besimple and rugged in construction and which will be adapted to a varletyot uses either singly or in combination with other units of similarconstruction.

Another object of my invention 1s to provide an electric heater which iscomposedof sections, each section being a self-contained heating unit,.the arrangement being such that any desired number of the sections maybe combined to form a heater of any desired size or capacity.

In .carryingout my lnvention 1 form a unit by securing a resistanceconductor to an elongated support which partially in closes theconductor. In one form of my invention I provide an elongated trough.

which may be U-shaped or channel shaped in. sectiongand secure aresistance conductor wound into 'a spiral centrally within the troughbut out of direct, contact tllBIEBWlthl This trough maybe convenientlymade by bending a strip of metal into the desired form and enameling themetal either before or after the bending operation. The resist 'ancespiral is '.'supported at intervals throughout its length andelecta=ica1 connec tions are made at the ends of the spirals. The unitsmay be placed side b sideand secured together so as to provi e aplurality of parallel resistance spirals which are separated from eachother bythesides of" the I troughs. Any desired number of these unitsmaybe secured together,- and thus any size or capacity of heater may belformed.

Otherobjects and purposes of my invention will appear in the course ofthe following specification, in which I have shown i purposes ofillustration.

In the drawing illustrating one form of PatentedNom el, 1913.

Applicetimi. filed September 21, 191a, s r alize. 5 3,92 1

= my invention, Figure 1 is .a perspective View iof aportion. ofmyheating unit; Fig. 2 isv ta fragmentary sectional view of the same;@Fig. 3 is a perspective view of one of the supporting members; and Fig.l is a pergspective View of a heater formed of a plurality of units.

i Referring to the drawings, 10 represents ia support for the resistanceconductor.

i Thissupport-is made in the-form of an, eloni gated channel shaped tr0ugh.,. This trough 3 may be, and preferably ismade of enameled metal,since the metal is, conveniently bent in desired form andtheenamelaffords elec-J trieal insulation and likewise prevents rusting, etc.Within this. trough 10 I secure the resistance conductor 11, whichconductor is I shown in the form offa spiral extending sub stantiallythroughout the length of the trough. The spiral is supported atintervals by supporting members '12. These support ing membersconsist'of a sleeve. portion 13 through which the spiral passes and ashank 14 which passes through the web member of the channel shapedtrough. The end of the shank is split 50 as to provide wings 15 whichare bent down to secure the member in place. The metal of the trough ispressed inward at 16 around the holefor receiving the supporting memberand an insulating sleeve '17 is fitted in the depression. An insulatingWasher '18 is on the'inner side of the depression. The shoulders19 onthe supporting member bear against the washer 18 and when the Wings 15are bent-down, as shown in Fig. 2, the support is held securely inplace. The supportin member is thus insulated from the metal -ic troughandthe enamel coating of the trough is not depended upon for thenecessary insulation. The ends of the spiral are connected to .ter-

minals 20 which are secured in place by bolts 21.- The spiral issupported substan-- In Fig. 4 I have "shown anumber of these unitsunited so as to form a heater. The

units are placed side by side and secured together by a strip 22. It isobvious that the number of these strips 22 for holding the unitstogether will depend upon the'length of the unit. The ends of thespirals in the adjacent troughs are connected together by connectors 23.These connections may be -made so that all of the spirals will be inseries, or in any manner desired. By the employment of my invention anydesired size or capacity of heater may be obtained by combining asuitable number of sections.

My invention will be found useful in connection with ovens, broilers andthe like where it is desired that the unit be accessible and at the sametime protected By Will suggest themselves to those skilled in the artWithout departing from the spirit of my invention, the scope of which isset forth in the annexed claims.

What I claim as new and desire to secure by Letters Patent of the UnitedStates, is,-

1. An electric heating unit comprising a channel shaped support, anelectrical resistance suspended within said support from the web memberthereof, and terminals for said resistance extending through thesuspending member.

2. An electric heating unit comprising a channel shaped support, anelectrical resistance coil suspended with-in said support from the Webmember thereof, means for insulating the said coil from said support andterminals extending from coil through the suspending member.

. 3. A sectional electric heater comprising a plurality of channelshaped supports, each having an electrical resistance suspended withinthe same from the Web member there. of and insulated therefrom,terminals connected to each of said resistances extending" through theweb members of said supports and means for mechanically connecting saidmembers together.

In Witness whereof, I have hereunto set my hand this 16th day ofSeptember, 1910..

ARCHIBALD S. CUBITT.

Witnesses:

FREDERICK M. VOGEL, J. G. Mnsonovn.

